The Seiko 5M42-0B90 is a watch model based on the 5M42 movement.
Parts List
| 270WB4JK01 | crystal - crystal |
| 270WB4JK | crystal |
| 8M40A2NNG1 | crown - crown |
| 8M40A2NN | crown |
| FH2981B01 | case back gasket - case back gasket |
| 80602601 | pusher |
| 4EY7JB | band - band |
| 4EY3KB | band - band |
| 4EY4KB | band - band |
| 2AH110A0BNG | others - minute hand |
| 2AB110L6BNG | others - minute hand |
| 1AB075L4BNG | others - hour hand |
| 3AX130F7ANG | others - second hand |
| 3AA125F1ANG | others - second hand |
| 81400709 | others - button spring clip |
| 81350540 | others - button spring |
| EG0060B01 | others - button gasket |
| 0351651 | others - winding stem |
| 5M420B907LZ | others - case |
| 5M420B90 | others - case back |
| 5M420B90RLZ | others - case |
| 0866640 | others - holding ring for dial |
| 0878729 | others - date dial |
| 5M420D48XS34 | others - dial |
| 5M420D58XS14 | others - dial |
| 5M420D68XE14 | others - dial |
| 5M425 | others - machine code |
| A170BS | others - push pin |
| AD006BA1 | others - crown gasket |
| 81400829 | others - button spring clip |
| AD006BA12 | others - crown gasket |
| 1AH080A0BNG | others - hour hand |
Caliber 5M42
